Thank you for viewing! "All the Formulas of Junior High School Math" - Usable for Life in 15 Minutes a Day - First edition, first printing: September 20, 2016 - First edition, eighth printing: October 29, 2020 - Supervisor: Toyofumi Konishi - Publisher: PHP Institute, Inc. I bought this for my daughter, but she didn't use it much. It was stored on a bookshelf, so there is some fading, scratches, wrinkles, and dirt, but the contents are in a clean condition. Please purchase only if you understand this.